Testing additions of Pseudomonas fluorescens HYK0210-SK09 to mitigate blooms of the diatom Stephanodiscus hantzschii in small- and large-scale mesocosms

Title
Testing additions of Pseudomonas fluorescens HYK0210-SK09 to mitigate blooms of the diatom Stephanodiscus hantzschii in small- and large-scale mesocosms
Author(s)
정승원; 토시야 가타노; 김영옥; 한명수
KIOST Author(s)
Jung, Seung Won(정승원)Kim, Young Ok(김영옥)
Publication Year
2010-09-12
Abstract
An algicidal bacterium Pseudomonas fluorescens HYK0210-SK09 (SK09) was applied to a natural bloom of Stephanodiscus hantzschii using a small-scale mesocosm (SM) and a large-scale mesocosm (LM) to clarify the algicidal effects and evaluate the response of the planktonic community and environments. When SK09 cells were inoculated at a final concentration of 5 x 106 cells mL-1, the abundance of S. hantzschii decreased significantly by 95% in SM and 85% in LM. The microcosm in the laboratory revealed that the abundance of Pseudomonas increased rapidly after inoculation with a corresponding decrease in the S. hantzschii population. Nutrient concentrations increased following the diatom cells. The abundances of non-dominant species such as Chlamydomonas, Cryptomonas and Navicula increased slightly with increased nutrient concentrations. The abundance of heterotrophic protists also increased significantly due to utilization of SK09 as food. The present study demonstrates that SK09 is an effective bio-control agent for natural S. hantzschii bloom and grazing pressure plays a crucial role in the successful application of algicidal bacteria to natural environments.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28769
Bibliographic Citation
8th International Symposium on Ecohydraulics 2010, pp.754, 2010
Publisher
ISE
Type
Conference
Language
English
Publisher
ISE
Related Researcher
Research Interests

Marine ecology,Plankton,Protists,해양생태,부유생물,원생생물

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